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Turbines are our friends
(thelemmy.club)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

Rules
This is a science community. We use the Dawkins definition of meme.
My point is that the "small difference in temperatures" where it's worthwhile to run a heat pump is still wide enough to run an air-exchange heat pump cost effectively damn near anywhere on Earth outside of the poles. You're arguing the finges when almost nobody would be affected by it.
And if you're using a geothermal heat pump, your thermal sink continuously sits around 50°F (while homes tend to be kept at 65-75°F), which means it should always be efficient.
Quit this conservative-esque route of arguing. It's bullshit and you know it.